CAIRO Egypt's forensics authority handed over to the prosecutor general's office on Saturday its final autopsy report on the Italian student who was tortured and found dead in Cairo last week.

Giulio Regeni, 28, had been researching independent trade unions in Egypt and had written articles critical of President Abdel Fattah al-Sisi's government - prompting speculation that he was killed at the hands of Egypt's security forces.

Egypt's interior and foreign ministers both dismissed the notion of security forces being behind Regeni's murder.

The prosecutor general's office said it would not publicly disclose the contents of the report as the investigation was ongoing. Reuters was not able to obtain a copy to verify the contents.

However, a senior source at the forensics authority told Reuters Regeni, a graduate student at Britain's Cambridge University, had seven broken ribs, signs of electrocution on his penis, traumatic injuries all over his body, and a brain haemorrhage.

His body also bore signs of cuts from a sharp instrument suspected to be a razor, abrasions, and bruises. He was likely assaulted using a stick as well as being punched and kicked, the source added.